[Xymon] integration of foreign graphs

[Mark Hinkle]

If you need to deal directly with the rrd's, then David's response has you covered nicely.

If you don't need to deal with the rrd's directly, i.e. you have images already (png) or a UI for accessing the graphs (Cacti), then another approach *might* be easier. YMMV, of course. We use Cacti for our graphing needs and incorporate those graph(s) into Xymon via an updated "svcstatus.sh" cgi script. There is a config file that we have created to hold the "mapping" info:

~xymon/server/etc/cacti.cfg
---------------------------
host1.cpu:2345
host1.disk:745

host2.cpu:13
host2.disk:456
host2.disk:457
host2.disk:458
etc.
etc.

where, above, the host and service are clear and are mapped to the local_graph_id in Cacti. The other side of the ":" could be anything though, as you will see. Assuming you are using the xymon dynamic status page setup, when you go to a particular status page in xymon you can see the host and service in the URL as parameters passed to svcstatus.sh. I have updated the svcstatus.sh to use the above config file to add a link into the displayed xymon page based on those parameters:

~xymon/cgi-bin/svcstatus.sh
---------------------------
#!/usr/bin/bash

# This is a wrapper for the Xymon svcstatus.cgi script

. /usr/xymon/server/etc/cgioptions.cfg

# Get HOST and SERVICE
export `echo $QUERY_STRING | sed -e "s/\&.*$//"`
export `echo $QUERY_STRING | sed -e "s/^[^\&]*\&//"`

for i in `cat /usr/xymon/server/etc/cacti.cfg | grep "$HOST\.$SERVICE" | awk -F: '{ print $2 }'`; do

   # Just appends multiple links/images/whatever to a temp file so you can get multiple images/graphs on the same page
   echo -n "<\/TD><\/TR><\/TABLE><TABLE><TR><TD align=center><a href='http:\/\/our.cacti.host\/cacti\/graph.php?local_graph_id=$i\&rra_id=all' target='_blank'><img src='http:\/\/our.cacti.host\/cacti\/graph_image.php?local_graph_id=$i\&rra_id=1' border=0><\/a>" >> /tmp/cactigraph.$$
done

# Get the temp file contents into a env variable for easy regexp use below
if [ -r /tmp/cactigraph.$$ ] ; then
   CACTI=`cat /tmp/cactigraph.$$`
else
   CACTI=""
fi
rm -f /tmp/cactigraph.$$

# Insert the links in the output of the status page for display
if [ ! -z "$CACTI" ] ; then
   exec /usr/xymon/server/bin/svcstatus.cgi $CGI_SVC_OPTS | sed -e "s/<PRE>/$CACTI<PRE>/"
else
   exec /usr/xymon/server/bin/svcstatus.cgi $CGI_SVC_OPTS
fi


You can really make that link anything you need; for us it is a call to cacti using the local_graph_id but for an existing png you could make the other side of the ":" in the config file the png filename and just use a straight <img> tag. Hope this helps.

-- 
Mark L. Hinkle
hinkman at hinkman.com